Backwater-valve for sewer-pipes.



B. T. VERNON.

BACKWATER VALVE FOR SEWER PIPES.

APPLICATION FILED MAY15,19I5- Patented June 20, 1916.

/ lllll Egg FM- THE COLUMBIA PLANouRAPh co., WASHINGTON. n. c.

5r I775 ATTO/WVEKS BERT T. VERNON, OF MINNEAPOLIS, MINNESOTA. i

BACKWATER-VALVE FOR SEWER-PIPES.

memes.

Specification of Letters Patent.

Application filed May 15, 1915. Serial No. 28,424.

To all whom it may concern:

Be it knownthat I, BERT T. VERNON, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Backwater-Valves for Sewer-Pipes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide an improved back water valve for sewer pipes, and to such ends, generally stated, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

These back water valves are intended for application in the sewer pipes leading from the sewer mains to houses or buildings, and the purpose thereof is to prevent flooded sewers from, backing up into the basements and flooding the same. Hitherto, these backwater valves have been normally held yieldingly closed, usually by gravity and adapted to open to permit the sewage to run from the house or building to the main sewer line but to check a back or reverse flow. They were subject to the serious objections that, as they were normally closed, they would not, under normal conditions, permit circulation of air required for ventilation.

My invention provides a back water valve which normally stands open. so as to permit free ventilation, to which, under a back flow of water from the flooded sewer, will close and prevent the flooded water from entering the basement.

This improved back water valve, which includes certain other important minor features, is illustrated in the accompanying drawings wherein like characters indicate like parts throughout the several views.

Referring to the drawings: Figure 1 is a vertical section taken centrally through a portion of a sewer pipe which leads from a main or straight sewer pipe into the basement of a house or building; Fig. 2 is a horizontal section taken on the line 00 m on Fig. 1; Fig. 3 is a view corresponding to Fig. 2 but showing the valve supporting fame in full; and Fig. 4: is a vertical section taken on the line w 00 on Fig. 3.

The said sewer pipe which leads from the street or main sewer into the basement is, as shown, made up of two sections 1 and 2 having abutting flanges connected with water-tight joints and clamped together by screws The pipe sections 1 and 2, near their ends, are preferably made round in cross section, but are made rectangular in the vicinity of the connected flanged ends thereof, and are preferably made approxh mately rectangular from points marked a and points marked 0 on Fig. 1. From point a and point b, the bottom portion of the pipe is fiat and inclined to a very considerable extent, and the fiat bottom of said pipe is also preferably slightly inclined in the same direction from point I) to point 0. The vertical sides and horizontal top of the abutting end portions of the pipe sections 1 and 2 are recessed so as to receive the vertical and top portions of a rectangular three-sided frame 1. This frame 4 has no bottom and the lower ends of its sides are beveled to fit the inclined bottom of the sewer pipe. The frame f is rabbeted so that it receives and closely fits the edge of a rectangular valve or gate 5. This valve, at one edge, is hinged to one side of the frame '4 by a vertically disposed hinge bolt (3 passed through the top of said frame, through one edge of the valve and down into a seat in the inclined bot tom of the sewer pipe. The valve or gate 5 is thus mounted to swing on a vertical pivot, and hence, will be frictionally held in whatever position it may happen to be left, but will be freely moved by the slightest flow of water through the sewer pipe in either direction. This opening movement is limited by a stop lug 7 shown as applied to a removable closure plate 8 that is bolted to and tightly closes a larger opening formed in the top of the pipe sec tion 2 in the vicinity of the valve 5. This stop limits the opening movement of the valve to approximately the position indicated by dotted lines in Figs. 1, 2 and 3, and stops the valve in such position that it will be moved and closed by a. very slight movement of water from the pipe section 2 toward the pipe section 1. Here, it may be stated that the said pipe section 1 extends into the basement while the pipe section 2 extends to the street or main sewer pipe. It will thus be seen that the valve 5 will Patented June 2Q, 1916.

- insures the clean always freely'open to permit the usual discharge of sewage from the house or building, will normally remain in an open position so as to afford free air circulation and ventilation, and will be closed by the initial back, flow of sewage the street main. The inclined bottom of the sewer pipe in the vicinity of the valve washing of all solid or refuse matter throughthe sewer pipe to points out of the line of movement of the valves i 7 It is highly important to note that the swinging movement of the valve 5 does not raise and lower the same, so that the said valve is always exposed to theback flow of a very slight amount of water through the sewer pipe. A valve hinged at its top, for

' example, would notonly close by gravity and normally remain I closed, but if normally sustained in an elevated pos1t1on,

- would not be acted upon by a back flow of water unless the sewer pipe should be nearly or quite filled with water.

'When'the stopper plateS is removed, access is afforded to the interior ofthe pipe and tothe valve 5. Also, it is important to notethat the pipe 2, near the valve 5 is widened so that when the valve is against the-stop7, ample room is left between the valveand the bulged side wall of the said pipe for the desired flow of's ewage from the building-to the street sewer.

What'I claim is:

1. The combination with a sewer pipe, of g a back flowcheck valve freely mounted on a verticalpivot,yso' that it will normally stand in whatever positionit may be set until acted ,upon by arflow of fluid in the but free for movements in the one direction one direction or the other through said pipe,

or the other under the flowof fluid'through said pipe. I r

2. The combination witha sewer pipe, of a back flow check valve therein mounted on a vertical pivot so that it will normally stand in whateverposition it may be set ,7 untilacted upon by a flow of fluid in the one direction or the a other through said pipe, and a stop limiting theopening movement of said valve to'a position'that'is oblique to the line of movement of the'fluid'through 'said pipe.

The combination with a sewer pipe coninand held between the abutting end portions of sa'idjp'ipe sections, and a back flow yvalve hinged at one verticaledge to one :vertical side' of said frame so that'it jwill nor- 7 jmally' stand in anyxposition in which it may F be set until acted upon by a flow in the one direction or the other through said pipe.

4. The combination with a sewer pipe, of a back flow check valve mounted on a vertical pivot, so that it will normally stand in or water from ends of said pipe sections, and a back flow.

valve hinged at one edge'to one side of said frame by a vertical pivot and arranged to stand in any position in which it may be set until acted upon by a flow in the one direction or the otherthrough said pipe.

6. The combination with a'sewer pipe, of a back flow check valve mounted on a vertical pivot, so it will normally stand in whatever position it maybe set until acted upon by a flow of fluid in the one direction or the other through the said pipe, the said pipe having a flat .inclined bottomportion extended 011 both sides of said valve.

7. The combination with a sewer pipe comprising two detachably connected sections, of'a rectangular frame comprising a horizontal top and vertical side portions seated in and secured between the abutting ends of said pipe sections, and a back flow valve hinged at one edge to one side of said frame by a vertical pivot and arranged to stand in any position in which it may be set until acted upon by a flow in the one direcframe by a free vertical pivot, whereby the said valve will normally stand in whatever vposition it may be set until acted upon'by a flow of fluid in the one direction or the other through said pipe, but free for movement in either direction when acted upon by the flow of fluid through said pipe.

In testimony whereof I aflix my signature in presence of two witnesses.

BERT T. VERNON.

Vitnesses HARRY D. KILeoIui, F. D. MERCHANT.

Copies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents,

Washington, D. G. 

